Q.

Aldoses & ketoses are differentiated by

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a

Periodic acid

b

Br2 water

c

Both 2 & 3

d

Since both are reducing sugars they cant be detected by Tollens reagent. Reducing sugars are those which contain free CHO group or Keto group linked to CH2OH group. They react with tollens or Fehling’s reagent and give respect test positive. Usually monosaccharides and all disaccharides give the test except Sucrose. Aldoses and ketoses both respond to Tollens test.

answer is D.

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